File: test14.m

package info (click to toggle)
ufsparse 1.2-7
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k
  • size: 27,536 kB
  • ctags: 5,848
  • sloc: ansic: 89,328; makefile: 4,721; fortran: 1,991; csh: 207; sed: 162; awk: 33; java: 30; sh: 8
file content (29 lines) | stat: -rw-r--r-- 593 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
% compare droptol with the equivalent MATLAB

rand ('state', 0) ;

for trial = 1:100
    m = fix (100 * rand (1)) ;
    n = fix (100 * rand (1)) ;
    d = 0.1*rand (1) ;
    A = sprandn (m,n,d) ;
    [i j x] = find (A) ;
    A = sparse (i,j,2*x-1) ;
    fprintf ('test14 m %3d n %3d nz %d\n', m, n, nnz (A)) ;
    Aorig = A ;

    % using CSparse
    tol = 0.5 ;
    B = cs_droptol (A, tol) ;

    % using MATLAB
    [m n] = size (A) ;
    s = abs (A) > tol ;
    [i j] = find (s) ;
    x = A (find (s)) ;
    A = sparse (i, j, x, m, n) ;

    if (norm (A-B,1) > 0)
	error ('!') ;
    end
end